II. Definitions

  1. Postural Orthostatic Tachycardia Syndrome (POTS)
    1. Symptoms of Orthostatic Intolerance with Tachycardia, but not significantly hypotensive

III. Epidemiology

  1. Prevalence: 0.2 to 1% in general U.S. population
  2. Age <50 years in most cases (peaks age 15 to 25 years)

IV. Symptoms

  1. See Orthostasis
  2. Symptoms occur on standing from supine (or seated position) and are relieved on returning to supine position
  3. Typically worse in mornings and chronic (duration 3-6 months) at diagnosis
  4. Dizziness or Light Headedness
  5. Chest Pain or Palpitations
  6. Orthostatic Syncope
  7. Nausea
  8. Pallor
  9. Weakness or Fatigue
  10. Dyspnea
  11. Blurred or dimmed Vision
  12. Neck or Shoulder Pain

V. Diagnosis

  1. Symptoms suggestive of Orthostasis (see above) AND
  2. Insignificant change in systolic Blood Pressure (BP decreases <20 mmHg) AND
    1. Does not meet criteria for Orthostatic Hypotension
  3. Tachycardia
    1. Sustained Heart Rate 30 bpm or higher within 10 minutes of standing (or Head-Up Tilt-Table Testing)
    2. Standing Heart Rate is typically >120 bpm
    3. When evaluating, age 12 to 19 year olds, requires Heart Rate increase >=40 bpm

VII. Evaluation

VIII. Management

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